package com.ny.demo523;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class Update {
        public static void main(String[] args) throws ClassNotFoundException ,SQLException {
           Connection connection=SqlConnection.getCon();
            Scanner scanner=new Scanner(System.in);
            System.out.println("请输入用户id");
            int id=scanner.nextInt();
            System.out.println("请输入用户名");
            String username=scanner.next();
            String sql ="update users SET username= ? where id= ? ";
            PreparedStatement preparedStatement=connection.prepareStatement(sql);
            preparedStatement.setString(1,username);
            preparedStatement.setInt(2,id);
            int i =preparedStatement.executeUpdate();
            if (i>0){
                System.out.println("修改成功");
            }
            else {
                System.out.println("修改失败");
            }
        }
    }

